Power Mac - PPC G5 upgrading graphic card

Hi, im new to this forum... i think its great here that everybody's so helpful fixin each others mac problems! so i figured to give it a shot...

here's how it goes:

For a long time i wanted to connect multiply monitors to my G5 1.8 dual. The problem was that the graphiccard's out were an ADC and a DVI. My monitors are VGA!
i got a DVI to VGA adapter, but its impossible to find a ADC to VGA adapter without payin a fortune... also i found out that they dont make em anymore!!

So i figured, why dont i get a ADC to DVI and a DVI to VGA, and put them together and make it work... but it didnt!!

Spec wise that should work. but you would be taking a performance hit with the graphics. If you could I would spend a little extra and go for an ATI 9600 or 9800 AGP Card for the mac version. That would give you the ports you want and give you a performace boost when it comes to games and video editing and such.